Kernrechtsfrage
Whether the company had to pay default interest on the acknowledged claim after set-off against its liability claim.
Extrahierter Entscheid
No. The set-off declaration extinguished the wage claim retroactively, so default interest fell away as well.
Extrahierte Begründung
A set-off declaration under Art. 120 ff. OR is a unilateral exercise of a formative right that immediately changes the legal position; no separate 'effective execution' is required. Because the reciprocal claims were set off, the default effects on the acknowledged claim ceased retroactively under Art. 124(2) OR.